Spring-wheel.



C. G. SMITH.

SPRING WHEEL.

APPLICATION FILED "18.11, 1913.

Patented Feb. 13, 1917.

2 SHEETS-SHEET 1.

C. G. SMITH.

SPRING WHEEL.

APPLICATION FILED FEB. n, 1913.

1,215,730. Patented Feb. 13,1917.

2 SHEETS-SHEET 2- 5% ammm Cicero W 5 mom mg UNITED STATES PATENT OFFICE.

GICERO G. SMITILDF PA'LISADES, COLORADO, ASSIGNOR TO 'IHE.TSMlUI.I-I.SPRILN'Gv WHEEL-1 COIVIPA'NY,I015v ALBUQUERQUE, NEW .MEXICO, A CORPORATION OEJARIZONA.

SPRING WHEEITI Specification of Letters Patent."

Patented. Feb. 13,1917.

Application file'd February '11, 191-3. SerialNoT-747y602s' To all whom it may cancer m Be it known that I,'C1cnRo-G5 Sirrrn a citizen of the-United States, residing .at the-1 city of Palisades, county of Mesa,-.and- State of Colorado, have invented-'certain-new and.

useful Improvements in Spring-WVheels; andI .do declare the-follow-mgto be a full, clear, and exact description of the-1nven--.

form a part of this specification:

My invention relates to improvementsln particularly over: my -CO-PGDCllIIg2JELPPl1Ca tion; 1 Serial No. 697,908, filed May: 17 1912.

Onecof the objects is -the eprovision= of means for :readily" clamping in placethe ex tremities of the springs. and for making the clampingbolt especially accessible for pur poses of installation and adjustment.

Another object 'of the invention-is to provide stops in connection with the fastening-z means for certain of-the springs,rsaid stops: being adapted to preventnthe fiexure of'the;

springs. beyond their :limits ofelasticity.

Other objects-willappear hereinafter asa- I proceed with thedescriptionpf that :embodiment-of the invention :whichnfor-the. purposes of the present application is illustrated in the accompanying drawings, in

which: 1

Figure 1 is a side 9 elevation of my'improved wheel.

Fig. 2 is a cross sectional detail taken upon line 22, Fig. 5.

Fig. 3 is a cross section taken i-upon'line 3s, Fig. 5.

Fig. 4 is a cross section taken upon line 14c, -Fi'g. 5. 4

Fig. 5 is a fraginental detail View, partly in section of a portion of the wheel with the hub plates removed.

Fig. 6 is an edge view of one of the circle springs.

Fig. 7 is a face View of the same looking in the direction of arrow 7 Fig. 6.

Fig. 8 is an edge view of one of the spoke springs.

Fig. 9 is a face View of the same looking in the direction of arrow 9, Fig. 8.

trated in the drawing, I have used two bolts The same reference numerals refer to i like parts throughout the :views.

In the-drawings, whichform-a part i of 1 this specification, the numeral-5 designates rubber tire of the cushion: variety WhiClYaou; 1s mounted upon a r1m6 provided at inter Vals with-transversebosses 7 and with lon gitudlnal ribs 8 between-each pair of bossess The hub of the wheel is in the form of a spider having an. inner-circular" member 9,

aniouter circular member 10 and radial=ar1ns 12 o1n1ng.-the two circular members; Bolt holes 13 are located-inthe hub, being formed in enlargements of thearms ll or in webs bridged across adjacent arms. The holes 13 701 spring wheels for vehicles,-and may be-:c0n-=- sidered an: improvement overemy Patent No. 1,017,319, issued December 17 1912, oiwmore located therein. Itwvill be notedthat-lthese 1.; side coverings are eachform'ed-of threesepa+ rate plates'15 andthatthe fastening for any of the springswmay' be made accessible hby removing only one-of said plates. r

Between the bosses '7 upon the :rim, anch @5 similar-bosses 16 uponzthe huh, 'I- mount cir-'" cular springs17-of fiat material while spri-ngs 18-0f the same material are also:

mounted in the 'bosses' 7 at theouterextrems ity of thespringssandnin the hub at the inner extremities.

In: each boss 16 is formed an Iopeningu19 constricted at its mouth to form a compara tively narrow passages Within the-lar-rge inner part of the opening-.19, I place a double nut '20, the outer" face of Which-.18 wedge; shape as clearly illustrated in; Fig.1 5. After :the hooked inner extremities ofithei circle springs.117 have been slid into places: within the opening 19, headless bolts 21: are insertedainto theethreaded perforations of the nut 20, the spningszbeingcut away ati22fl in order to permit the free passage of the bolts. 1 Although in the construction *illus#-'--- 21 and other parts accordingly, it should be understood that I do not limit myself to the use of two bolts, since the number employed may be varied according to the nature of the work for which the wheel is intended.

A washer plate 23 is slid into place upon the bolts and is pressed against the inner sides of the springs 17 by nuts 24, the tightening of the nuts 24 drawing the wedge nut 20 outwardly thereby spreading and clamp- 110 ing the extremities of the springs. After the nuts 24 have been placed, internally threaded sleeves 25 are secured upon bolts 21, the sleeves being shaped externally like nuts and being long enough to completely cover the sides of the bolts when screwed down tightly against the nuts 24:.

The fastenings for the outer extremities of the circle springs 17 and spoke springs 18 are precisely the same as the fastenings just described, except for the fact that the opening in the boss 7 is larger in order to accommodate both sets of springs. The outer bolt 28 is also somewhat longer than the bolt 21 and the sleeve 29 is correspondingly longer than the sleeve 25. Otherwise, I have used the same reference numerals in the drawings to refer to the parts of the outer fastenings.

In the outer extremities of the circle springs 17 are cut out portions 26 and in the outer extremities of the spoke springs 18 are similar cut out portions 27 for the reception of the bolts 28.

Midway between the bosses 16 upon the hub, are formed recesses 30 from the rear of which extend smooth openings 31 through the circular portion 10 of the hub. After the inner extremities of the spoke springs 18 have been inserted into the opening 30, clamping blocks 32 are also inserted into the same opening, these blocks being provided on their adjacent sides with threaded bolt sockets 33 tapering gradually toward the mouth of the opening 30 adapted to receive bolts 34, the threaded portions of which are formed with the same taper. As the heads 35 of the bolts are rotated, the latter spread apart, the blocks 32 thereby clamping the springs 18 against the walls of the opening 30. Recesses 36 are cut into the inner end of each spring 18 for the re ception of the bolts 3-1.

In assembling my improved wheel-all of the spring members, the nuts 20 and the blocks 32 are slid into place from one side before the plates 15 are put in position. The entire wheel may be put together without the use of machinery or of any tool other than a wrench.

Attention is called to the fact that the sleeves 25 and 29 serve a double purpose:

first, they act as lock nuts and second, they act as stops to prevent a sudden shock or an excessive load from breaking the springs or bending them beyond a point from which they cannot completely recover.

I claim as my invention:

1. In a spring wheel, means for clamping flat springs consisting of an element having an opening therein, said springs adapted to be inserted in said opening, clamping blocks also arranged in said opening, the adjacent faces of said blocks being each cut away to form a common threaded bore tapering toward the mouth of said opening and a correspondingly tapered bolt threaded into said bore from the rear of the opening.

2. In a spring wheel, means for clamping flat springs consisting of an element having an opening therein, adapted to receive the ends of the springs along oppositely. disposed walls, clamping blocks arranged in said opening adjacent the springs, the adjacent faces of said blocks being each cut away to form a common bore tapering toward the mouth of the opening and a correspondingly tapered bolt extending into said bore from the inner extremity of the opening.

3. In a wheel, a hub, a rim, spring members located between and connecting the hub and rim, the said members being approximately semi-circular in shape and arranged in pairs to form approximately circular elements, the extremities of the two members of each element being bent outwardly to form eyes, the rim and hub being respectively provided with members of counterpart shape which the said eyes respectively engage, radially alined bolts located between the eyes of each pair of spring members'of each spring element, and extending both interiorly and exteriorly of the said eyes, and abutments applied to the adjacent extremities of the said bolts for the purpose set forth.

In testimony whereof I aflix my signature in presence of two witnesses.

CICERO Gr. SMITH.

l/Vitnesses:

OLIVE LjDAvIs, ARTHUR A. J ONES.

copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. C. 

